Frequently Asked Questions

In the early phase we give an estimate per m² of floor area based on building type and specification. Once the design is complete, we prepare a detailed bill of quantities for every item — from excavation to door handles — and offer a fixed lump-sum or unit-price contract. Price adjustments are only possible for scope changes you request, and they are agreed in writing beforehand.

For a typical 6–10 storey residential building, allow 2–4 months for design and permits and 14–20 months for construction, depending on the basement depth, facade system and finishes. Larger complexes are built in phases. The exact schedule is part of the contract, with milestone dates and penalties for delay.

Yes. In turnkey and flat-for-land projects we prepare all design documents, submit the building permit application to the municipality, work with the independent building inspection firm throughout construction and apply for the occupancy permit at the end. You only need to sign the documents that require the owner's signature.

We are liable for defects within the periods set by law, with longer liability for the load-bearing structure. On top of that, our after-sales team responds to warranty requests for installations, windows and finishes and documents every intervention. Manufacturer warranties for equipment such as lifts and boilers are handed over with the as-built file.

Of course. Owners and investors can visit the site by appointment, accompanied by the site engineer and with the required personal protective equipment, which we provide. In addition, you receive weekly photo reports and a monthly progress statement comparing the actual status with the schedule.

The ratio depends on the plot's location and zoning rights, the expected sales prices, construction costs and the specification. We present a transparent feasibility calculation so that you can see how the offer was built. In central locations landowners typically receive 40–55% of the units; the agreed ratio, flat allocation and delivery terms are fixed in a notarised contract.

It depends on the concrete strength, the reinforcement detailing, the soil and the building's remaining service life. As a rule of thumb, if retrofitting costs more than about 40% of a new building, or the concrete quality is very low, demolition and reconstruction is the better long-term choice. Our engineers compare both options with costs and timelines so that the owners can decide on solid data.

In many cases, yes. Techniques such as external shear walls, column jacketing from the outside and FRP wrapping can be applied in phases, flat by flat. Work in each flat is usually limited to a few days, and we agree the schedule with residents in advance. Where interior work is extensive, a short temporary move may be recommended.

Yes. Developers, main contractors, industrial zones and municipalities hire us for excavation and retaining systems, site roads and utility networks as a separate package. We work with our own machinery and crews, provide method statements and safety plans, and coordinate closely with the main contractor's schedule.